D39PX-23

Fine grading. It requires a stable platform, precise and responsive hydraulics and easy to operate operator controls. The D39PX-23 scores top marks in all of those categories. The super slant nose design moves the coolers and hydraulic fan to the rear and the operator forward to create a balance that makes fine grading a snap. With its wide track, the D39PX-23 has a big, stable platform to work the blade off of, essential for fine grading. A fully hydrostatic drivetrain gives the operator incredibly quick and precise maneuverability. And new Power and Economy working modes allow the operator to adjust his machine’s performance to his current job and save on fuel consumption as he’s doing it. Like all Komatsu products, the D39PX-23 has the advanced hydraulics to make the addition of a grade control system seamless and turn it from a great grading tractor to an incredibly precise and fast fine grading system.

Features

Daily Checks

All daily checks can be performed efficiently from the left side of the machine.

ECO Guidance

In order to support optimum operation, the following 4 recommendations are displayed to improve fuel saving operation:

1) Avoid Excessive Engine Idling

2) Use Economy Mode to Save Fuel

3) Avoid Hydraulic Relief Pressure

4) Avoid Overload

The operator can access the ECO guidance menu to check the Operation Records, Eco Guidance Records, and Average Fuel Consumption logs.

Electronic Controlled Hydraulic System (EPC) Blade Control Joystick

Blade control joystick uses the EPC valve and joystick, similar to the travel control joystick. EPC control combined with the highly reliable Komatsu hydraulic system enables superb fine control. A switch is now used to angle the PAT blade. A button to activate float is also provided.

Hydraulically-Driven Swing-up Fan

The D37-23 utilizes a swing-up fan with a gas strut-assisted lift locking system to provide easy access to the (side-by-side) radiator, oil cooler, and charge air cooler. The swing-up feature makes it easier to access cooling cores. The hydraulic fan can rotate in the reverse direction to help remove debris from cooler cores.

Modular Design

One of the design goals behind the creation of the D37 was to manufacture a more durable machine. This was achieved by reducing component complexity and using a strong modular design for increased serviceability and durability. Steel castings reduce the number of welds, improving C-frame rigidity and strength.

New HST Technology

The D39-23 incorporates new proprietary engine and hydrostatic transmission pump control technology to improve operational efficiency and reduce fuel consumption to levels lower than a conventional HST control system can obtain. This Komatsu exclusive feature reduces fuel consumption by up to 10% in P mode in demanding working conditions and up to 20% in E mode under lighter load conditions as compared to the prior model.

Powerful turns under various work conditions are achieved with the new HST transmission, even under load. Counter-rotation is available for minimum turning radius, providing excellent maneuverability in tight spots.

Palm Command Control System (PCCS) Travel Joystick

Power Angle Tilt (PAT) Dozer With Adjustable Pitch

A Power Angle Tilt dozer blade with highly durable box-structure frame is available for the EX and PX machines. The hydraulic blade tilt and angling functions and manually adjustable blade pitch expand versatility and productivity in a variety of applications. This PAT dozer assembly is tested to stringent test standards.

Rear View Monitoring System

On the large LCD color monitor, the operator can view, through one camera, areas directly behind the machine. This camera can be synchronized with reverse operation.

Robust Guarding And Attachments

Komatsu offers a full guarding package to help protect your machine and operator in severe applications.

Secondary Engine Shutdown Switch

A new secondary switch has been added, at the side of the front console, to shut down the engine.

Selectable Working Mode

Working mode E is for general dozing applications with adequate speed and power while reducing fuel consumption and CO2. Working mode P is aimed at powerful operation and maximum production. The working mode is easily switched on the monitor panel, depending on the work at hand.

E mode (Economy mode)

With E mode, the engine outputs enough power for most general dozing applications without delivering unnecessary power. This mode allows for energy saving operation and is suitable for work on ground where the machine may experience shoe slip or applications not requiring large power such as downhill dozing, leveling and light-load work.

P mode (Power mode)

With P mode, the engine outputs its full power, allowing the machine to perform large production, heavy-load, or uphill work.

Single Pedal (Decelerator/Brake Pedal) to be operated for Speed Control, during Operation

Machine operation becomes simple because brake function has been integrated into decelerator pedal. Machine moving speed including/excluding engine speed can be controllable by using only one pedal of decelerator/brake pedal. Operation of pedal function can be changed by the mode selector switch.

Decelerator mode

The pedal can decelerate engine RPMS and vehicle travel speed. Normally can be used for all applications.

Brake mode

The pedal can decelerate vehicle travel speed, keeping high engine revolution. This mode can be helpful to keep work equipment controllability and/or force, even during braking.

Unrivaled Blade Visibility

Variable and New Customizable Quickshift Modes

The D39-23 offers two gearshift modes: Variable and the new Customizable Quick shift. Variable shift mode provides 20 incremental speed settings for the operator, while the new Customizable Quick shift provides 3 speed settings; all can be adjusted in the monitor to obtain the right speed for different operator preferences.

Service Refill Capacities

Coolant

9.0 U.S. gal

34 ltr

Fuel tank

50.2 U.S. gal

190 ltr

Engine oil

2.9 U.S. gal

11 ltr

Hydraulic tank

15.8 U.S. gal

60 ltr

Final drive (each side)

0.9 U.S. gal

3.5 ltr

Steering System

Palm Command Control System (PCCS) joystick control for all
directional movements. Pushing the joystick forward results in
forward machine travel, while pulling it rearward reverses the
machine. Simply tilt the joystick to the left or right to make a turn.
Tilting the joystick fully to the left or right activates counter-rotation.

Hydrostatic Transmission (HST) provides smooth powerful turns.
Fully electronic control enables smooth control that can be adjusted
in the monitor. The PCCS utilizes shift buttons to increase and
decrease speed.